Kyle Feldscher, CNN - The Montgomery County Police press office said Tuesday afternoon that it received a call to assist for a report of an active shooter at Walter Reed National Military Medical Center.

Rep. Dutch Ruppersberger, D-Maryland, tweeted about the situation from inside the center.

"I am currently at Walter Reed Medical in Bethesda where we've been told there is an active shooter," Ruppersberger said. "I am currently safe in a conference room w/ approx 40 others."

Two individuals separately told CNN they were inside the building at Walter Reed just before 3 p.m. Tuesday and were told to continue to shelter in place. One individual said loudspeakers announced that it was still an active situation. The other individual reported hearing lots of sirens.

There were no further immediate details available.

This is a breaking story and will be updated.

original story: